asmhatreandClaude Sonnet 5
af615cc17c
Silent int/long overflow reproduced with real numbers, the Math *Exact() family (addExact/subtractExact/multiplyExact/incrementExact/decrementExact/ negateExact/toIntExact/absExact) with the abs(MIN_VALUE) trap absExact exists to catch, widening to long vs BigInteger, and the XOR-based overflow bit trick Math.addExact uses internally, cross-checked against BigInteger ground truth over 100k random int pairs per JUnit repeat. Co-Authored-By: Claude Sonnet 5 <[email protected]> Claude-Session: https://claude.ai/code/session_01FhzLY5p6okFva3qsnsRyvM
20 lines
1.1 KiB
Markdown
20 lines
1.1 KiB
Markdown
# java-core-examples
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Runnable companion code for ankurm.com's Java-core / concurrency series. One Maven module per
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article; each module's own README has that article's version table, quickstart, and traps.
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| Module | Post |
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| [`jmm`](jmm/) | The Java Memory Model Explained: volatile, happens-before, and Why Your Double-Checked Lock Failed |
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| [`locks`](locks/) | synchronized vs ReentrantLock vs StampedLock: Benchmarks and a Decision Table |
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| [`atomics`](atomics/) | Java Atomics and VarHandle: CAS, LongAdder, and When Atomics Beat Locks |
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| [`vt-pinning`](vt-pinning/) | Diagnosing Virtual Thread Pinning in Production: JFR Events, jcmd, and Real Fixes |
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| [`synchronizers`](synchronizers/) | CountDownLatch vs CyclicBarrier vs Phaser vs Semaphore in Java |
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| [`executors`](executors/) | ExecutorService Done Right: Shutdown, try-with-resources and Virtual Thread Executors |
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| [`concurrency-interview`](concurrency-interview/) | Top 40 Java Concurrency Interview Questions and Answers (2026) |
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| [`arithmetic`](arithmetic/) | Add Two Numbers in Java Without Overflow: addExact, Widening, and BigInteger |
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## License
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MIT - see [LICENSE](LICENSE).
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